The student to faculty ratio is the number of students who attend a school divided by the number of teachers in the institution.
It is an important factor to evaluate colleges because the low student to faculty ratio tends to lead the smaller class sizes and giving more one-to-one learning Opportunities to students in classroom. Higher student to faculty ratio means that an instructor (professor) has more students to take care and the individual class size may be larger. In general, top ranked and well-known colleges have low level of students to faculty ratio and try to keep the ratio low.
University of Pittsburgh-Titusville has the lowest number of students per faculty (2 to 1) and Los Angeles County College of Nursing and Allied Health has the second lowest number of students (3) based on academic year 2019-2020 college academci data.
Below table ranks and compares the Lowest Students to Faculty Ratio having lowest students to faculty ratio.

Lowest Students to Faculty Ratio Comparison Table

RankCollege NameIn-State Tuition & FeesOut-of-State Tuition & FeesStudent PopulationOnline Student PopulationGraduation RateNumber of Programs OfferedFinancial Aid AmountStudents to Faculty Ratio
1University of Pittsburgh-Titusville
Titusville, PA
$11,626$21,56633-31%12$10,4962 to 1
2Los Angeles County College of Nursing and Allied Health
Los Angeles, CA
$5,050$5,050200--2$2,8953 to 1
3Suncoast Technical College
Sarasota, FL
$6,272$6,2871,045-91%42$2,9914 to 1
4Hillyard Technical Center
Saint Joseph, MO
$12,630$12,63090-81%17$7,8244 to 1
5Nebraska Indian Community College
Macy, NE
$4,080$4,08021013911%9$2,0764 to 1
6River Valley Community College
Claremont, NH
$7,160$15,41069432236%32$3,3984 to 1
7Great Plains Technology Center
Lawton, OK
$3,415$3,790186-88%22$3,2464 to 1
8Salina Area Technical College
Salina, KS
$8,127$8,1276976761%36$2,1765 to 1
9Pamlico Community College
Grantsboro, NC
$1,867$6,47536228845%35$4,4935 to 1
10Cankdeska Cikana Community College
Fort Totten, ND
$3,300$3,30018217611%21$3,6785 to 1
Average$4,628$8,3255,168,9652,475,75735%-$4,45917 to 1